@knovator/image-resizer

@knovator/image-resizer

Express middleware for resizing images.
Explore the docs »

View Demo · Report Bug · Request Feature

Table of Contents

1. About The Project
   • Built With
2. Getting Started
   • Installation
3. Usage
4. Roadmap
5. Contributing
6. License
7. Contact

About The Project

• @knovator/image-resizer is an express middleware that generates images of size and format passed in URL using sharp package.
• @knovator/image-resizer takes input of public folder path and when it receives a request it checks if the requested image exists in the public folder. If it doesn't, it generates the image in resolution folder and serves it.
• resolution is passed in the URL as width and height parameters. For example, in /images/1200x850/image.jpg URL 1200 is width and 850 is height. It accepts resolution from 2 digits to 6 digits..
• Image generation done in following setps:
  • Check if the image exists in the public folder by removing resolution. For example
    • /images/800x800/image.jpg will be checked in /images/image.(jpg|png|webp|jpeg).
  • If the image doesn't exist, it generates the image in specified resolution folder.
• It also generates images of different format in resolution folder if the image of that format is not exists.
  • For example /images/800x800/image.jpg image request will be generated as /images/800x800/image.jpg by taking /images/image.(jpg|png|webp|jpeg) as input.

(back to top)

Built With

• sharp
• glob

(back to top)

Getting Started

@knovator/image-resizer is built as an express middleware, so NodeJS application setup with expressjs is required to start.

Installation

1. Install the package

   npm i @knovator/image-resizer
   # or
   yarn add @knovator/image-resizer

(back to top)

Usage

• Usage of @knovator/image-resizer is simple. It takes input of public folder path similar to express.static middleware.For example,

  const { resize } = require('@knovator/image-resizer');
  
  app.use(resize(__dirname + '/public'));

• @knovator/image-resizer considers jpg, png, webp and jpeg image formats. if you want to use other formats, you can pass it in the extensions parameter. For example,

  const { resize } = require('@knovator/image-resizer');
  
  app.use(resize(__dirname + '/public', { extensions: ['.png', '.jpg', '.jpeg', '.webp'] }));

(back to top)

Roadmap

• [ ] Support for image hosted in s3 bucket.

See the open issues for a full list of proposed features (and known issues).

(back to top)

Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement". Don't forget to give the project a star! Thanks again!

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/AmazingFeature)
3. Commit your Changes (git commit -m 'Add some AmazingFeature')
4. Push to the Branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

(back to top)

License

Distributed under the MIT License. See LICENSE.txt for more information.

(back to top)

Contact

Knovator Technologies

• Twitter @knovator
• Web https://knovator.com/